James F. Hoffman

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Huntington, WV, US

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Patents Grantslast 30 patents

Information Patent Grant
Environmentally improved asphalt compositions and their preparation
- Patent number 5,961,709
- Issue date Oct 5, 1999
- Marathon Ashland Petroleum LLC
- Roger E. Hayner
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Endothermic removal of coke deposited on catalytic materials during...
- Patent number 4,450,241
- Issue date May 22, 1984
- Ashland Oil, Inc.
- William P. Hettinger
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Endothermic removal of coke deposited on catalytic materials during...
- Patent number 4,425,259
- Issue date Jan 10, 1984
- Ashland Oil, Inc.
- William P. Hettinger
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Endothermic removal of coke deposited on sorbent materials during c...
- Patent number 4,412,914
- Issue date Nov 1, 1983
- Ashland Oil, Inc.
- William P. Hettinger
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...